Toner set, developer set, image forming apparatus, and image forming method
US8389186B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2010 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Sep 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G2215/0129
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner set is composed of toners of a plurality of colors that are used in a tandem-type color image forming apparatus. Each of the toners of a plurality of colors includes toner base particles and an external additive. The external additive includes small-diameter silica particles and large-diameter silica particles larger than the small-diameter silica particles. When, of the toners of a plurality of colors, three color toners to be used consecutively for forming the toner image are defined as a first toner, second toner and third toner respectively in order of usage thereof, the average particle diameter of the large-diameter silica particles contained in the second toner is smaller than the average particle diameter of the large-diameter silica particles contained in the first toner and is larger than the average particle diameter of the large-diameter silica particles contained in the third toner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.